. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 53 feeding area, so that the pupa prior to moth emergence is able to push its way easily into the open. The cocoon, constructed of pieces of bark and silk, is similar to the larger one of Sanninoidea exitiosa. Time of Adult Emergence,—Moths first appear in the orchards during the latter v part of May, and are present until late in August (Fig. i). During the five years, 1937 to 1941 inclusive, the peak emergence occurred during the week. 2© A 11 16 25 Z 9 >6 23 30 6 13 20 27 JUNE JULY AUGUST Fig.
. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 53 feeding area, so that the pupa prior to moth emergence is able to push its way easily into the open. The cocoon, constructed of pieces of bark and silk, is similar to the larger one of Sanninoidea exitiosa. Time of Adult Emergence,—Moths first appear in the orchards during the latter v part of May, and are present until late in August (Fig. i). During the five years, 1937 to 1941 inclusive, the peak emergence occurred during the week. 2© A 11 16 25 Z 9 >6 23 30 6 13 20 27 JUNE JULY AUGUST Fig. i: Weekly emergence records of lesser peach borers at Vineland Station, Ont. ending July 2 or that ending July 9. The rate of emergence in summary form is presented in Table I. Out of a total of 1208 moths taken in the orchard cages during the five-year period, 48, or per cent., emerged during May; 422, or per cent., during June; 587, or per cent., during July; and 151, or per cent., in August. Table i: Summary of the Emergence of Lesser Peach Borer Moths at Vineland Station from 1937 to 1941 Inclusive 1937 1938 1939 1940 1Q41 Average First moth emerged June 1* May 21 May 29 June 6 May 20 May 20 10% emergence completed " 10 June 11 June 7 " 14 " 28 June 8 25% emergence completed " 28 " 23 " 28 July 2 June 23 " 25 50% emergence completed July 10 July 1 July 6 " 13 » 30 Jul7 5 75% emergence completed " 22 " 11 " 20 " 23 July 14 " 19 90% emergence completed Aug. 2 Aug. 1 Aug. 7 Aug. 3 " 31 Aug. 2 Emergence completed " 18 " 19 " 19 " 18 " 16 " 19 Number of moths observed 210 231 320 160 287 1208 *Approximate date. Habits of the Moth,—Emergence takes place from 6 to 10 , the time depending largely on the temperature. After resting for about half an hour to. Please note that these images are extracted from scanned page images that may have been digitally e
Size: 2056px × 1215px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
